One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,7,8)(3,11,12,6)(4,13,16,9)(5,15,14,10)(17,18,23,26)(19,24,27,22)(20,21,25,31)(28,29,32,30)(34,39)(36,43)(41,45)(44,48)(1,3,7,12)(2,6,8,11)(4,14,16,5)(9,10,13,15)(17,19,23,27)(18,24,26,22)(20,28,25,32)(21,29,31,30)(34,39)(35,40)(41,45)(42,47)(2,8)(6,11)(9,13)(10,15)(19,27)(22,24)(28,32)(29,30)(33,34,38,39)(35,36,40,43)(37,45,46,41)(42,48,47,44)(1,4,7,16)(2,9,8,13)(3,5,12,14)(6,15,11,10)(17,20)(18,21)(19,28)(22,30)(23,25)(24,29)(26,31)(27,32)(33,35)(34,36)(37,42)(38,40)(39,43)(41,44)(45,48)(46,47)(1,5)(2,10)(3,4)(6,13)(7,14)(8,15)(9,11)(12,16)(17,21)(18,25)(19,29)(20,26)(22,28)(23,31)(24,32)(27,30)(33,36)(34,40)(35,39)(37,44)(38,43)(41,47)(42,45)(46,48) involution — undirected(1,6,7,11)(2,3,8,12)(4,15,16,10)(5,13,14,9)(17,22)(18,19)(20,30)(21,28)(23,24)(25,29)(26,27)(31,32)(33,37)(34,41)(35,42)(36,44)(38,46)(39,45)(40,47)(43,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.